WORM_AUTORUN.SLRB

August 02, 2016
 Analysis by: Jennifer Gumban
 ALIASES:

Win32/AutoRun.VB.BEZ worm (NOD32)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Via removable drives, Downloaded from the Internet, Dropped by other malware

This worm arrives by connecting affected removable drives to a system. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It uses the default Windows folder icon to trick users into opening the file. Double-clicking the file executes this malware.

It drops copies of itself in all removable and physical drives found in the system. It drops copies of itself in all drives. These dropped copies use the names of the folders located on the said drives for their file names.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

65,536 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

26 Jul 2016

Payload:

Compromises system security, Connects to URLs/IPs

Arrival Details

This worm arrives by connecting affected removable drives to a system.

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This worm drops the following copies of itself into the affected system:

  • {malware path}\.exe

It uses the default Windows folder icon to trick users into opening the file. Double-clicking the file executes this malware.

Propagation

This worm drops copies of itself in all removable and physical drives found in the system.

It drops copies of itself in all drives. These dropped copies use the names of the folders located on the said drives for their file names.

Other Details

This worm connects to the following website to send and receive information:

  • http://{BLOCKED}.{BLOCKED}.124.107/setup.html

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.676.04

FIRST VSAPI PATTERN DATE:

26 Jul 2016

VSAPI OPR PATTERN File:

12.677.00

VSAPI OPR PATTERN Date:

27 Jul 2016

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.SLRB. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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